Agreed the term "overboost" is carryover from recip engines, but is nonetheless used on turbines.
EGT (or ITT) protection is generally not provided for big fan engines, on the theory that an alert crew can bring an engine back within limits without exceeding the time-temperature envelope.
Rotor speed protection generally has double or triple redundancy for dangerous overspeed, but any time you exceed the published power management value (N1 or EPR) for existing ambient conditions, some kind of maintenance check is called for.
Since you probably don't have CDP (burner pressure) readout on the panel, you can't do anything about it. But rest assured there is overpressure protection, since a burner pressure vessel burst is about the last thing you'd like to happen!